remove test demos

[sparkoo]

closes #58

[Copilot]

Pull Request Overview

This PR removes test demo functionality from the home page by eliminating hardcoded demo links and a test function. The changes clean up the user interface by removing development/testing artifacts that were likely not intended for production use.

• Removes test demo links section with hardcoded GitHub URLs for various CS:GO maps
• Removes test button and associated click handler function
• Simplifies the home page interface by removing development testing elements

Comments suppressed due to low confidence (1)

web/src/Index/Home.jsx:43

• The button text contains a spelling error: 'Testt' should be 'Test'. However, since this line is being removed, this is not a concern.

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